Question
How many like only
Science? In a class of 55 students, 40 like Science and 29 like Mathematics. If each student likes at least one subject, answer the following questions.Solution
Number of students who like Science = 55 – 14 = 26.
A man rows upstream 10 km and downstream 15 km taking 5 hours each. Find the man’s speed in still water.
...The ratio of the speed of boat ‘A’ in still water, the speed of boat ‘B’ in still water and the speed of the current is 11:5:2, respectively. If...
The speed of the boat in still water is 6 km/hr and the speed of the stream is 3 km/hr. A boat goes 54 km downstream with its usual speed but at the tim...
The distance covered by a boat while moving in downstream in a fixed time is 3/4 more than in upstream. The speed of stream is what % of the still water...
When a speed of stream is 25% of the speed of boat in still water. If the boat can travel 60 km upstream in 5 hours and 80 km downstream in 4 hours, the...
A boat covers 180 km each in upstream and downstream in a total time of 10 hours. It also takes 5 hours to travel 40 km upstream and 140 km downstream. ...
- A boat covers (x – 20) km upstream in the same time it covers (2x – 95) km downstream. If the speed of the boat and stream are 15 km/h and 3 km/h respe...
A man can swim at the rate of 8 km/hr in still water. If the speed of the water is 3 km/hr, then the time taken by him to swim 15 km upstream is
A boat can cover 170 km in downstream in 2 hours and 145 km in upstream in 5 hours. Find the speed of boat in still water.
The respective ratio between the time taken by a boat to travel the same distance downstream in stream A and that in stream B is 7 : 5. The speed of the...
Relevant for Exams:
